Offered here is TWO (2), or One Pair of, Aurora Plastics Co. OEM, AFX Specialty MAGNATRACTION, 4-Gear, HO Slot Car, Medium-SLIM REAR Tires Part #8741. Will work fine on Ideal TCR, Matchbox Speedways and other similar 'larger rimmed' cars. A Bit Smaller or larger, but works well. Incredible to find as new old stock after so many years, They are Vintage, Original Equipment Manufactured and Unused. They Will slip onto just about any 4-gear Specialty Magnatraction Chassis. NOTE: Close approximation of the size of the Aurora #8741 rear tire; Inside diameter is 9mm (.35in), Outside diameter is 12.5mm (.5in), Tread thickness is 1.75mm (.07in), Depth of the tire is 6.5mm (.25in).